43133785636
domain: N
Appears in sequences
- Denominators of continued fraction convergents to sqrt(5).at n=18A001076
- a(0) = 0, a(1) = 4, then a(n) = 18*a(n-1) - a(n-2).at n=9A060645
- Nonprimes which are the average of two consecutive Fibonacci numbers.at n=16A071683
- Ratio-determined insertion sequence I(0.264) (see the link below).at n=17A085348
- Expansion of (1 + x)^2/((1 + x + x^2)*(1 + 3*x + x^2)).at n=26A113066
- Expansion of -x/((x^2+x+1)*(x^2+3*x+1)); invert transform gives signed version of tetrahedral numbers A000292.at n=26A113067
- Negative of the Hankel transform of C(n) - C(n+2), where C = A000108.at n=25A138268
- p-INVERT of the positive integers, where p(S) = 1 - S^2.at n=26A290890
- Expansion of (1 - x + x^2)/((1 - x + x^2)^2 - 4*x^2).at n=26A376716
- Lower (1/2)-midsequence of (F(2n)) and (F(2n+1)), where F=A000045 (Fibonacci numbers); see Comments.at n=26A387778
- Upper (1/2)-midsequence of (F(2n)) and (F(2n+1)), where F=A000045 (Fibonacci numbers); see Comments.at n=26A387779